Dual shower head unit



FIG. 1 is a top plan view of a dual shower head unit showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof; and,

FIG. 4 is a fragmentary cross-sectional view taken along line 4--4 of FIG. 3. 

The ornamental design for a dual shower head unit, as shown and described. 